According to Dermal Therapy, there is no scientific evidence that
moisturizers will prevent wrinkles:
"Time magazine has reported that there may be some solid science
behind claims that skin creams help keep your skin looking young, but
there is no solid scientific evidence that non-prescription skin
creams help to prevent thinning and wrinkling."
Aging and Skin Moisturizers
EmbarrassingProblems.com says the same thing:
"Moisturizers cannot prevent or really get rid of wrinkles. They coat
the skin with a very thin layer of oil or silicone, which prevents it
drying out. If skin is dry, wrinkles are more noticeable, so by
keeping the skin moist and plump they help to blank out smaller
wrinkles. It is best to apply a moisturizer after washing in the
morning, while your skin is slightly damp."
Wrinkles and general skin ageing
According to the UC Davis School of Medicine:
"Moisturizers help prevent dryness, bruising, and tearing but have no
effect on wrinkles by themselves."
What Are Some Home Care Treatments For Reducing Wrinkles?
Why can't moisturizers prevent wrinkles, you might wonder? Wrinkles
are caused by a breakdown in collagen production (collagen is the
protein that gives your skin it's elasticity). When the collagen
breaks down, you get wrinkles, and the only way to stop that is to
ensure the continuous production of collagen:
"Cosmetic manufacturers make a lot out of dry skin lines and claim
that untreated, they will lead to wrinkles. This is not true because
dry skin lines are caused by a dehydrated stratum corneum and the
remedy is moisturizer. Wrinkles on the other hand, are caused by sun
damage and the degeneration of collagen and elastin fibers in the
dermis. The only way to improve wrinkles is to stimulate, in
particular, collagen production. The only product that has been proven
to do that is tretinoin (vitamin A acid), although there is some
evidence that alpha-hydroxy acids (AHAs), beta-hydroxy acids (BHA's)
and vitamin C may have some effect.
Moisturizers do not prevent wrinkles because they cannot penetrate
into the dermis to stimulate collagen synthesis."
Although moisturizers can not prevent wrinkles, they should not be
dismissed out of hand as useless - moisturizers are still helpful in
reducing moisture loss through the skin:
"What is moisturizing all about? First, when we speak of moisturizing
the skin we are really talking about moisturizing the stratum corneum
or the dead horny layer of the skin that is visible. Second, it is
water that moisturizes the stratum corneum. When you get out of the
bath, the stratum corneum is moisturized but it doesn't stay this way
for long because the atmosphere quickly dries it up. In order to
moisturize the skin, one has to put water into the stratum corneum and
keep it there. This is exactly what moisturizers do. In medical terms,
they reduce "transepidermal water loss" (TEWL)."
Hope this helps!
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